We added from ML Toys their 775 with speed gears and also throttle modulator and 2 new 12 volt batteries plus the am/fm cd player with speakers behind fake rear window cavity and also under the drivers seat. LED fog lights, and under glow inside and outside of truck which has it's own 12 volt supply which can be also used as back up power supply.
New solid rear axle to replace stock hollow one we changed the shifter assembly as well and did a complete re wire of the truck as well and am now doing seat and interior upgrade.